From 3fc027df4fca0355717515abb4d6e3753e6dee2a Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 8 Dec 2007 06:59:59 +0000 Subject: implement __builtin_return_addr(0) on ppc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44700 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCMachineFunctionInfo.h | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) (limited to 'lib/Target/PowerPC/PPCMachineFunctionInfo.h') diff --git a/lib/Target/PowerPC/PPCMachineFunctionInfo.h b/lib/Target/PowerPC/PPCMachineFunctionInfo.h index bf1fea211b..f6d70899aa 100644 --- a/lib/Target/PowerPC/PPCMachineFunctionInfo.h +++ b/lib/Target/PowerPC/PPCMachineFunctionInfo.h @@ -27,18 +27,29 @@ private: /// when using frame pointers (dyna_add, dyna_sub.) int FramePointerSaveIndex; - /// UsesLR - Indicates whether LR is used in the current function. + /// ReturnAddrSaveIndex - Frame index of where the return address is stored. /// + int ReturnAddrSaveIndex; + + /// UsesLR - Indicates whether LR is used in the current function. This is + /// only valid after the initial scan of the function by PEI. bool UsesLR; + /// LRStoreRequired - The bool indicates whether there is some explicit use of + /// the LR/LR8 stack slot that is not obvious from scanning the code. This + /// requires that the code generator produce a store of LR to the stack on + /// entry, even though LR may otherwise apparently not be used. + bool LRStoreRequired; public: - PPCFunctionInfo(MachineFunction& MF) - : FramePointerSaveIndex(0) - {} + PPCFunctionInfo(MachineFunction &MF) + : FramePointerSaveIndex(0), ReturnAddrSaveIndex(0), LRStoreRequired(false){} int getFramePointerSaveIndex() const { return FramePointerSaveIndex; } void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; } + int getReturnAddrSaveIndex() const { return ReturnAddrSaveIndex; } + void setReturnAddrSaveIndex(int idx) { ReturnAddrSaveIndex = idx; } + /// UsesLR - This is set when the prolog/epilog inserter does its initial scan /// of the function, it is true if the LR/LR8 register is ever explicitly /// accessed/clobbered in the machine function (e.g. by calls and movpctolr, @@ -46,6 +57,9 @@ public: void setUsesLR(bool U) { UsesLR = U; } bool usesLR() const { return UsesLR; } + void setLRStoreRequired() { LRStoreRequired = true; } + bool isLRStoreRequired() const { return LRStoreRequired; } + }; } // end of namespace llvm -- cgit v1.2.3